Allow the selection-dag based selector to be diabled with -disable-pattern-isel.
For now, this is the default, as the current selector is missing some big pieces.
To enable the new selector, pass -disable-pattern-isel=false to llc or lli.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19335 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index 0e3eea4..daa97b2 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -41,6 +41,9 @@
cl::opt<bool> DisableOutput("disable-x86-llc-output", cl::Hidden,
cl::desc("Disable the X86 asm printer, for use "
"when profiling the code generator."));
+ cl::opt<bool> DisablePatternISel("disable-pattern-isel", cl::Hidden,
+ cl::desc("Disable the pattern isel XXX FIXME"),
+ cl::init(true));
#if 0
// FIXME: This should eventually be handled with target triples and
@@ -110,7 +113,10 @@
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
- PM.add(createX86SimpleInstructionSelector(*this));
+ if (DisablePatternISel)
+ PM.add(createX86SimpleInstructionSelector(*this));
+ else
+ PM.add(createX86PatternInstructionSelector(*this));
// Run optional SSA-based machine code optimizations next...
if (!NoSSAPeephole)
@@ -165,7 +171,10 @@
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
- PM.add(createX86SimpleInstructionSelector(TM));
+ if (DisablePatternISel)
+ PM.add(createX86SimpleInstructionSelector(TM));
+ else
+ PM.add(createX86PatternInstructionSelector(TM));
// Run optional SSA-based machine code optimizations next...
if (!NoSSAPeephole)